# Rect::GetSize

```cpp
Vector2 GetSize() const
```

获取矩形尺寸。

**返回：** `Vector2` - 尺寸向量 (width, height)

**复杂度：** O(1)

**示例：**

```cpp
Rect rect(10.0f, 20.0f, 100.0f, 50.0f);
Vector2 size = rect.GetSize();  // (100.0f, 50.0f)
```